import sys
import math
from collections import defaultdict
from bisect import bisect_left, bisect_right

sys.setrecursionlimit(10**7)
def input():
    return sys.stdin.readline()[:-1]

mod = 10**9 + 7

def I(): return int(input())
def LI(): return list(map(int, input().split()))
def LIR(row,col):
    if row <= 0:
        return [[] for _ in range(col)]
    elif col == 1:
        return [I() for _ in range(row)]
    else:
        read_all = [LI() for _ in range(row)]
        return map(list, zip(*read_all))

#################

X = I()

if 400 <= X <= 599:
    print('8')
elif 600 <= X <= 799:
    print('7')
elif 800 <= X <= 999:
    print('6')
elif 1000 <= X <= 1199:
    print('5')
elif 1200 <= X <= 1399:
    print('4')
elif 1400 <= X <= 1599:
    print('3')
elif 1600 <= X <= 1799:
    print('2')
elif 1800 <= X <= 1999:
    print('1')
else:
    pass import sys sys import math math from collections import defaultdict from bisect import bisect_left, bisect_right sys.setrecursionlimit(10**7) sys.setrecursionlimit sys setrecursionlimit 10**7 10 7 def input():
    return sys.stdin.readline()[:-1] input return sys.stdin.readline()[:-1] sys.stdin.readline()[:-1] sys.stdin.readline() sys.stdin.readline sys.stdin sys stdin readline :-1 -1 mod = 10**9 + 7 mod 10**9 + 7 10**9 10 9 7 def I(): return int(input()) I def LI(): return list(map(int, input().split())) LI def LIR(row,col):
    if row <= 0:
        return [[] for _ in range(col)]
    elif col == 1:
        return [I() for _ in range(row)]
    else:
        read_all = [LI() for _ in range(row)]
        return map(list, zip(*read_all))

################# LIR if row <= 0:
        return [[] for _ in range(col)]
    elif col == 1:
        return [I() for _ in range(row)]
    else:
        read_all = [LI() for _ in range(row)]
        return map(list, zip(*read_all))

################# row <= 0 row 0 [] for _ in range(col) for _ in range(col) _ range(col) range col for _ in range(col) [] return [[] for _ in range(col)] [[] for _ in range(col)] elif col == 1:
        return [I() for _ in range(row)]
     col == 1 col 1 I() for _ in range(row) for _ in range(row) _ range(row) range row for _ in range(row) I() I return [I() for _ in range(row)] [I() for _ in range(row)] LI() for _ in range(row) for _ in range(row) _ range(row) range row for _ in range(row) LI() LI read_all = [LI() for _ in range(row)] read_all [LI() for _ in range(row)] return map(list, zip(*read_all)) map(list, zip(*read_all)) map list zip(*read_all) zip *read_all read_all row row col col X = I() X I() I if 400 <= X <= 599:
    print('8')
elif 600 <= X <= 799:
    print('7')
elif 800 <= X <= 999:
    print('6')
elif 1000 <= X <= 1199:
    print('5')
elif 1200 <= X <= 1399:
    print('4')
elif 1400 <= X <= 1599:
    print('3')
elif 1600 <= X <= 1799:
    print('2')
elif 1800 <= X <= 1999:
    print('1')
else:
    pass 400 <= X <= 599 400 <= X 400 X 599 print('8') print '8' elif 600 <= X <= 799:
    print('7') 600 <= X <= 799 600 <= X 600 X 799 print('7') print '7' elif 800 <= X <= 999:
    print('6') 800 <= X <= 999 800 <= X 800 X 999 print('6') print '6' elif 1000 <= X <= 1199:
    print('5') 1000 <= X <= 1199 1000 <= X 1000 X 1199 print('5') print '5' elif 1200 <= X <= 1399:
    print('4') 1200 <= X <= 1399 1200 <= X 1200 X 1399 print('4') print '4' elif 1400 <= X <= 1599:
    print('3') 1400 <= X <= 1599 1400 <= X 1400 X 1599 print('3') print '3' elif 1600 <= X <= 1799:
    print('2') 1600 <= X <= 1799 1600 <= X 1600 X 1799 print('2') print '2' elif 1800 <= X <= 1999:
    print('1') 1800 <= X <= 1999 1800 <= X 1800 X 1999 print('1') print '1' X = I() I() X mod = 10**9 + 7 10**9 + 7 mod def LIR(row,col):
    if row <= 0:
        return [[] for _ in range(col)]
    elif col == 1:
        return [I() for _ in range(row)]
    else:
        read_all = [LI() for _ in range(row)]
        return map(list, zip(*read_all))

################# def LIR(row,col):
    if row <= 0:
        return [[] for _ in range(col)]
    elif col == 1:
        return [I() for _ in range(row)]
    else:
        read_all = [LI() for _ in range(row)]
        return map(list, zip(*read_all))

################# LIR def LI(): return list(map(int, input().split())) def LI(): return list(map(int, input().split())) LI def I(): return int(input()) def I(): return int(input()) I def input():
    return sys.stdin.readline()[:-1] def input():
    return sys.stdin.readline()[:-1] input
import sys
import math
from collections import defaultdict
from bisect import bisect_left, bisect_right

sys.setrecursionlimit(10**7)
def input():
    return sys.stdin.readline()[:-1]

mod = 10**9 + 7

def I(): return int(input())
def LI(): return list(map(int, input().split()))
def LIR(row,col):
    if row <= 0:
        return [[] for _ in range(col)]
    elif col == 1:
        return [I() for _ in range(row)]
    else:
        read_all = [LI() for _ in range(row)]
        return map(list, zip(*read_all))

#################

X = I()

if 400 <= X <= 599:
    print('8')
elif 600 <= X <= 799:
    print('7')
elif 800 <= X <= 999:
    print('6')
elif 1000 <= X <= 1199:
    print('5')
elif 1200 <= X <= 1399:
    print('4')
elif 1400 <= X <= 1599:
    print('3')
elif 1600 <= X <= 1799:
    print('2')
elif 1800 <= X <= 1999:
    print('1')
else:
    pass